#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main() {
    char a;
    while (scanf("%c", &a) != EOF)
    {
        if ((a >= 'a' && a <= 'z') || (a >= 'A' && a <= 'Z'))
            printf("%c is an alphabet.\n", a);
        else
            printf("%c is not an alphabet.\n", a);
        getchar();
    }
    return 0;
}